Mobile device to provide continuous and discrete user authentication

Disclosed is a mobile device to provide continuous and discrete user authentication. The mobile device may include: a contextual sensor; a soft biometric sensor; and a processor. The processor may be configured to: implement a background authentication process in a continuous manner based upon a soft biometric input from the soft biometric sensor and a contextual input from the contextual sensor; determine an anomaly event; and based upon the anomaly event, request a discrete authentication input from the user. 本发明揭示种提供连续和离散用户认证的移动装置。所述移动装置可包含：情境传感器；软生物识别传感器；和处理器。所述处理器可经配置以：基于来自所述软生物识别传感器的软生物识别输入和来自所述情境传感器的情境输入而以连续方式实施后台认证过程；确定异常事件；以及基于所述异常事件，请求来自用户的离散认证输入。